Journal of Frontiers of Computer Science and Technology ›› 2022, Vol. 16 ›› Issue (2): 359-371.DOI: 10.3778/j.issn.1673-9418.2106023

• Network and Information Security • Previous Articles     Next Articles

Privacy Data Protection Scheme for Patients with Major Outbreaks

HAN Gang, LYU Yingze+(), LUO Wei, WANG Jiaqian   

  1. School of Cyberspace Security, Xi’an University of Posts and Telecommunications, Xi’an 710000, China
  • Received:2021-06-07 Revised:2021-08-30 Online:2022-02-01 Published:2021-09-01
  • About author:HAN Gang, born in 1990, Ph.D., lecturer, member of CCF. His research interests include public key cryptography and attribute-based encryption.
    LYU Yingze, born in 2000, student member of CCF. His research interests include blockchain technology and property-based encryption.
    LUO Wei, born in 1987, Ph.D., lecturer, member of CCF. His research interests include public key cryptography and cloud storage data security.
    WANG Jiaqian, born in 1999, student member of CCF. His research interests include blockchain technology and cloud computing.
  • Supported by:
    National Natural Science Foundation of China(62102312);Natural Science Basic Research Program of Shaanxi Province(2021JQ-722);Young Talent Fund of University Association for Science and Technology in Shaanxi Province(20210119);Scientific Research Program of Shaanxi Provincial Education Department(20JK0906)


韩刚, 吕英泽+(), 罗维, 王嘉乾   

  1. 西安邮电大学 网络空间安全学院,西安 710000
  • 通讯作者: + E-mail:
  • 作者简介:韩刚(1990—),男,陕西宝鸡人,博士,讲师,CCF会员,主要研究方向为公钥密码学、属性基加密。
  • 基金资助:


In 2020, the global outbreak of COVID-19 made the global healthcare system face huge test, and the security of COVID-19 patients privacy data is an extremely important part of the healthcare information system. During the outbreak, there were numerous cases of privacy data leakage of Chinese patients with COVID-19, which caused great distress to patients. This paper proposes a patient privacy data protection scheme combined with blockchain for major epidemics using delegated Byzantine fault tolerant (dBFT) mechanism. The scheme is based on a federated chain, distributing different players such as government agencies, medical institutions and the public in a dual-chain model of main and side chains, and using side chain technology to interact with information between the main and side chains for secure sharing of patient data. It proposes the on-chain hierarchical data encryption scheme (HDES), which protects the patient privacy data on the chain at a fine-grained level using hierarchical encryption technology. Finally, the requested data throughput of the main-side dual-chain model and the encryption and decryption efficiency of the HDES scheme are experimentally analyzed and compared with the existing blockchain electronic medical case scheme. The comparison results show that this scheme has certain efficiency, strong security and high relevance.

Key words: blockchain, delegated Byzantine fault tolerant (dBFT) mechanism, hierarchical encryption, privacy protection, secure sharing



关键词: 区块链, 委托拜占庭容错机制(dBFT), 分级加密, 隐私保护, 安全共享

CLC Number: